Don't dismiss keyboard when tapping another text input

Summary:
When using text inputs inside a ScrollView with `keyboardShouldPersistTaps=false` (default behavior) tapping another text input dismisses the keyboard instead of keeping it open and focusing the new text input which I think is the better and expected behavior.

See #10628 for more discussion about that. Note that this affects nothing but the behavior with text inputs unlike #10628.

cc satya164 MaxLap ericvicenti
Closes https://github.com/facebook/react-native/pull/10887

Differential Revision: D4178474

Pulled By: ericvicenti

fbshipit-source-id: 0c62ea2fac0017d559d1f8674b0a686a5e1b3d2d

Libraries/ReactNative/requireNativeComponent.js

@@ -101,7 +101,7 @@ function requireNativeComponent(
   return createReactNativeComponentClass(viewConfig);
 }
 
-var TypeToDifferMap = {
+const TypeToDifferMap = {
   // iOS Types
   CATransform3D: matricesDiffer,
   CGPoint: pointsDiffer,
@@ -115,7 +115,7 @@ function processColorArray(colors: []): [] {
   return colors && colors.map(processColor);
 }
 
-var TypeToProcessorMap = {
+const TypeToProcessorMap = {
   // iOS Types
   CGColor: processColor,
   CGColorArray: processColorArray,